condition mean min max ZT0-3 57.351477 57.351477 57.351477 ZT4-7 55.991858 55.991858 55.991858 ZT8-11 54.522797 54.522797 54.522797 ZT12-15 55.901185 55.901185 55.901185 ZT16-19 63.2226175 63.2226175 63.2226175 ZT20-23 68.628761 68.628761 68.628761